Model 239-1F Floor Monitor
December
2010
3.
GAS
BOTTLE
INSTALLATION
1.
The instrument typically comes with a regulator, a valve, a brass fitting, two white plastic
compression nuts, and some vinyl tubing. The valve is in the box with the regulator, the
other parts may be in a separate bag.
2.
Screw the valve into the output of the regulator. If there is an arrow on the valve, it should
point away from the regulator. Screw the fitting onto the valve. Use Teflon tape or sealant
on the connections.
3.
Set the gas bottle onto the cart and secure with the provided strap. To adjust the strap, open
the buckle completely, extend or retract the strap through the latch as necessary then close
the buckle. Attach the regulator onto the bottle.
4.
Remove the existing nut from the fitting on the regulator. Insert one end of the vinyl tubing
into one of the plastic nuts and screw the nut onto the fitting. Finger tight is sufficient.
5.
Cut the subbing to the desired length to reach the top of the box on the handle of the cart that
has the flowmeters. Remove the existing nut from the fitting on the quick disconnect above
the “IN” flowmeter. Insert the other end of the vinyl tubing into one of the plastic nuts and
screw the nut onto the fitting. Finger tight is sufficient.
6.
Proceed to the operating procedures section of this manual.
4. OPERATING
PROCEDURES
3
CAUTION: If the output has a quick-
connect fitting, insert a male quick-connect
prior to applying the gas supply.
o
Turn the flow control valve off.
3
CAUTION: Do not overtighten.
o
Turn valve on gas supply bottle to the
OPEN position. The high pressure regulator
should show the supply pressure from the gas
bottle.
o
Turn outlet regulator valve clockwise to
register between 3-5 psi.
o
Open the flowmeter valve on the cart's
input flowmeter. Adjust the input flowmeter to
100 cc/min to flush the air out of the detector.
After flush, flow may be reduced to 35 cc/min.
Allow 10 minutes to purge the system.
3
NOTE: The outlet flow indicator on
the flowmeter box will not immediately
indicate flow when system is first turned
ON. The primary purpose of the outlet
flowmeter on the flowmeter box is to check
for system leaks. This process is addressed
in the Maintenance Section to follow.
o
Connect the detector to the counting
instrument
(1) HV is preset at the factory to read
alpha, beta, and gamma.
(2) Background count will read
approximately 1000-1400 cpm.
(3) If only alpha detection is required,
the HV may be adjusted to where the
background will read 0-5 cpm.
o
Adjust the height of the detector for
optimum performance.
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